摘要
以昆明市为例,利用1∶50000纸质地形图在ArcGIS中完成等高线矢量化,并在ERDAS中建立高精度的DEM数据。再采用ETM+影像制作的昆明市正射影像作为三维表面的纹理信息,应用ERDASIMAGINE8.7的VirtualGIS模块,在相同的投影坐标系统下,将数字高程模型(DEM)数据与遥感正射影像进行叠加实现了昆明市的三维地形可视化。
As an example for Kunming City, using papery topographic map, contour line was made in AreGIS, and then high precision DEM data was created in ERDAS. Based on texture information of the 3D surface from ETM＋ Image, using the ERDAS IMAGINE 8.7＇s module of VirtualGIS, orthographic and DEM data were overlapped to create three-dimensional terrain modeling and visualization of Kunming in the same projection reference frame.
出处
《云南地理环境研究》
2007年第1期63-66,共4页
Yunnan Geographic Environment Research
基金
昆明理工大学研究生创新基金项目(YB06005)
